- (This article is about Olaf from Advance Wars. You may be looking for the Olaf from The Lost Vikings.)
Olaf is a CO of the Blue Moon nation in the Advance Wars series. He used to be a CO of the Orange Star nation which Nell worked under, but when the Blue Moon nation became interested in him, he switched sides and attacked the Orange Star nation. He is the first CO the player faces in the first few missions in the first Advance Wars.